JP3598582B2 - Underfloor zone formation method - Google Patents

Underfloor zone formation method Download PDF

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Publication number
JP3598582B2
JP3598582B2 JP12739095A JP12739095A JP3598582B2 JP 3598582 B2 JP3598582 B2 JP 3598582B2 JP 12739095 A JP12739095 A JP 12739095A JP 12739095 A JP12739095 A JP 12739095A JP 3598582 B2 JP3598582 B2 JP 3598582B2
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Prior art keywords
floor
zone forming
mat
forming material
underfloor
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Expired - Lifetime
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JP12739095A
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JP3598582B6 (en
JPH08302980A (en
Inventor
正人 渡辺
博之 小笠原
裕俊 河野
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Nitto Boseki Co Ltd
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Nitto Boseki Co Ltd
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Priority to JP1995127390A priority Critical patent/JP3598582B6/en
Priority claimed from JP1995127390A external-priority patent/JP3598582B6/en
Publication of JPH08302980A publication Critical patent/JPH08302980A/en
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Description

【0001】
【産業上の利用分野】
本発明は、オフィス等で用いられる二重床の床下空間を仕切る床下ゾーン形成工法に関する。
【0002】
【従来の技術】
ビル建築等のオフィスの空調設備は、天井吹き出し方式から床吹き出し方式へと変わりつつある。天井吹き出し方式が温冷された空気を天井裏に設置されたエアダクトにより搬送し室内に吹き出すのに対し、床吹き出し方式はコンクリートスラブと二重床パネルとの間をエアーチャンバーとして利用し、温冷された空気を床パネルの開口部より室内へ吹き出す。この場合、温冷された空気を必要とするところと必要としないところに対応して床下を仕切ることがエネルギーロスを少なくすることになり、所謂ゾーン形成材が必要とされている。
従来このような二重床には火災時における床下の延焼を防ぐことを目的とし、ロックウールマット又はガラスウールマットを当該部に敷き詰めたり、施工性を上げるためロックウールマット等を積層し、ガラスクロスを巻き付けたりしてゾーン形成材として用い間仕切りしていた。ロックウールマット又はガラスウールマットは切断等の加工をする際ロックウールあるいはガラスウールの一部が粉塵と化しそのままマットに残留する。このため二重床下をチァンバーとして使用する場合、これらのゾーン形成材では吹き出し空気によりゾーン形成材からの埃や粉塵と化したロックウールあるいはガラスウールの一部等が床パネルの開口部より室内へ飛散し居住者に不快感を与えていた。
また、弾力性に欠けるゾーン形成材を使用した場合、床スラブ上に配線ケーブルが配設されているとき床スラブとゾーン形成材と配線ケーブルとの間に生じる三角目地が大きくなり、空気漏れが大きくなるなどの問題もあった。
一方、有機発泡系のゾーン形成材には防塵性、弾力性に優れたものはあるがいずれも防火性に問題がある。
【0003】
【発明が解決しようとする課題】
本発明は、従来から用いられている無機質繊維マットの断熱性、防火性を損なうことなく前記問題を解決することができる防塵性や弾力性に優れたゾーン形成工法を提供することを課題とする。
【0004】
【課題を解決するための手段】
前記課題は、二重床構造のコンクリートスラブと床パネルとの間をエアチャンバーとして利用する床吹き出し方式空調設備において、密度5〜150kg/m に形成された無機質繊維マットを1枚または2枚以上積層したマットの全面を金属箔で被覆し、かつ二重床構造のコンクリートスラブと床パネルの間隔の1.2〜1.5倍の厚さの床下用ゾーン形成材を、該二重床構造のコンクリートスラブと床パネルとの間に、無機質繊維の配向が床面に平行になるように敷設することを特徴とする床下ゾーン形成工法によって解決される。
本発明における無機質繊維マットは公知の方法によりガラスウール及びロックウールの繊維化時にバインダーを吹き付け、繊維をほぼ層状に形成させ、所望の厚さ、密度となるようプレスしながら乾燥しキュアして得られる。このようにして得た無機質繊維マットは1枚でも所定の規格に切断等の加工を行い本発明の床下用ゾーン形成材に使用するが必要に応じてこの無機質繊維マットを複数枚積層して1枚のマットとして本発明の床下用ゾーン形成材に使用する。床スラブ上に配線ケーブルが配設されている場合床スラブとゾーン形成材と配線ケーブルとの間に三角目地が生じることを防ぐためにはゾーン形成材に弾性が必要である。この弾性は無機質繊維マットの密度と繊維の配向によって大きく影響を受ける。本願発明のゾーン形成材では無機質繊維マットの密度を5〜150kg/mとし繊維の配向を床面に平行とすることによって垂直方向の十分な弾性が得られる。無機質繊維マットの密度が5kg/mより小さいとマットの強度、保形性が劣りゾーン形成材としては不適であり、また150kg/mより大きいとマットが硬くなり、柔軟性が著しく劣り前記三角目地が生じて空気漏れが大きくなるほか火災時に火が走るのを助けることもある。より好ましい無機質繊維マットの密度は10〜100kg/mである。
【0005】
本発明における金属箔は厚さ1〜50μのアルミ箔、銅箔等である。一般的にアルミ箔は加工性も良く低価格であり最も適している。これらの金属箔にガラスクロス、樹脂フィルムあるいは不織布を張り合わせたものは強度もあり加工もしやすく本発明の金属箔に含まれ使用できる。
【0006】
本発明における無機質繊維マットの全面を金属箔で被覆する方法はクロロプレン系接着剤でマットに隙間なく張り無機繊維マットからの埃や粉塵の飛散を防ぐ方法が挙げられる。
【0008】
【作用】
本願発明の床下用ゾーン形成材は無機質繊維マットを1枚または2枚以上積層し、その全面を金属箔2によって完全に被覆してあるため、埃や無機質繊維等からの粉塵を空気中に撒き散らすことはない。また密度を5〜150kg/mとし無機質繊維が床面に平行になるように積層してあるので垂直方向の弾性に極めて優れるので床スラブとパネルの間に敷設されたとき、床下用ゾーン形成材の表面はパネル下面にタイトに接し、裏面は床スラブにタイトに接する。また床スラブ上に電線ケーブル等が配設されていても無機質繊維マットの優れた弾性によって床スラブと床下ゾーン形成材と配線ケーブルとの間に三角目地はほとんど生じないため空気の漏れは極めて少ない。
【0009】
【実施例】
[実施例1]
図に基づいて説明する。ロックウール繊維2がマット平面に平行に配向する密度40kg/m、厚さ50mm、バインダー吹付け量3重量%のロックウールマットを巾100mm、長さ1000mmに裁断し、図1に示すようにその2枚をロックウール繊維2がマット平面に平行に配向するように貼り合わせた。この貼り合わせたロックウールマット1の全面をアルミガラスクロス(サンヨーバリア製アルマット HS50)3で包むように被覆して密度40kg/m、厚さ100mm、巾100mm、長さ1000mmの本発明の床下用ゾーン形成材を得た。
【0010】
[比較例1]
密度160kg/m、厚さ25mm、バインダー吹付け量3重量%のロックウールマットを巾100mm、長さ1000mmに裁断し、その4枚をロックウール繊維がマット平面に平行に配向するように貼り合わせた。この貼り合わせたロックウールマットの全面をガラスクロスで包むように被覆して密度160kg/m、厚さ100mm、巾100mm、長さ1000mmの比較用の床下用ゾーン形成材を得た。
【0011】
[比較例2]
密度40kg/m、厚さ50mm、バインダー吹付け量3重量%のロックウールマットを巾100mm、長さ1000mmに裁断し、その2枚をロックウール繊維がマット平面に平行に配向するように貼り合わせた。この貼り合わせたロックウールマットの全面をガラスクロスで包むように被覆して密度40kg/m、厚さ100mm、巾100mm、長さ1000mmの比較用の床下用ゾーン形成材を得た。
【0012】
[試験]
実施例1、比較例1及び2で得た床下用ゾーン形成材について以下の試験をしその結果を表1に示した。
防塵性:実施例1、比較例1及び2で得た床下用ゾーン形成材をそれぞれ大きさ1.5m×1.5m程度の黒色のペーパー上に置き軽く手で10回叩き、その後床下用ゾーン形成材を取り除き黒色ペーパー上の埃(粉塵を含む)の数を観察する。
弾性(柔軟性):図2に示すように水平なコンクリートスラブ4上に直径30mmのパイプ5を置き、その上に直交するように床下用ゾーン形成材6を乗せ、上から脚長70mm、4支持のコンクリート床パネル7を敷置し、コンクリート床パネル7と床下用ゾーン形成材6との隙間(隙間A)、及びパイプと床下用ゾーン形成材とコンクリートスラブの三角目地(隙間B)を観察する。
防火性:JIS A 1321による基材試験。
【0013】
【表1】

Figure 0003598582
【0014】
【発明の効果】
表1の結果が示す通り本願発明の床下ゾーン形成工法は防塵性、弾性、防火性に優れるので、本願発明の床下用ゾーン形成工法で仕切られた二重床構造の床吹き出し空調は、床下用ゾーン形成材による埃の発生がほぼ無く、弾性に富むため仕切りから漏れる空気が極めて少なく空調を必要とするところに無駄なく配風することができ、床下用ゾーン形成材自体高い断熱性を有するので省エネルギー効果が極めて高い。また防火性にも優れるので床下の延焼防止にも十分にその効果を発揮する。
【図面の簡単な説明】
【図1】床下用ゾーン形成材の断面図
【図2】床下用ゾーン形成材の弾性試験説明図
【符号の説明】
1 ロックウールマット
2 ロックウール繊維
3 アルミガラスクロス
4 コンクリートスラブ
5 パイプ
6 床下用ゾーン形成材
7 コンクリート床パネル
8 三角目地[0001]
[Industrial applications]
The present invention relates to an underfloor zone forming method for partitioning a double-floor underfloor space used in offices and the like.
[0002]
[Prior art]
Air conditioning equipment in offices such as building construction is changing from a ceiling blow-out system to a floor blow-out system. The ceiling blow-out method transports heated and cooled air through an air duct installed behind the ceiling and blows it into the room, whereas the floor blow-out method uses the space between the concrete slab and the double floor panel as an air chamber, and The blown air is blown into the room through the opening of the floor panel. In this case, partitioning under the floor corresponding to places where hot and cold air is needed and places where it is not needed will reduce energy loss, and a so-called zone forming material is required.
Conventionally, such a double floor is intended to prevent the spread of fire under the floor in the event of a fire, and laying a rock wool mat or a glass wool mat on the relevant portion or laminating a rock wool mat or the like to improve workability, glass A cloth was wound around and used as a zone forming material to partition. When a rock wool mat or a glass wool mat is subjected to processing such as cutting, a part of the rock wool or the glass wool turns into dust and remains on the mat as it is. Therefore, when the double floor is used as a chamber, a part of rock wool or glass wool which has been turned into dust or dust from the zone forming material by the blown air into the room through the opening of the floor panel in these zone forming materials. The splatters were causing discomfort to residents.
In addition, when a zone forming material that lacks elasticity is used, when a distribution cable is arranged on a floor slab, a triangular joint generated between the floor slab, the zone forming material, and the distribution cable becomes large, and air leakage occurs. There were also problems such as becoming larger.
On the other hand, some organic foam-based zone forming materials are excellent in dust resistance and elasticity, but all have a problem in fire resistance.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide a zone forming method excellent in dustproofness and elasticity that can solve the above-mentioned problem without impairing the heat insulating property and the fireproof property of the inorganic fiber mat used conventionally. .
[0004]
[Means for Solving the Problems]
The object is to provide one or two inorganic fiber mats formed at a density of 5 to 150 kg / m 3 in a floor-blowing air conditioning system using a double floor structure between a concrete slab and a floor panel as an air chamber. or laminated mat entirely coated with metal foil, and a 1.2 to 1.5 times the thickness under floor zone forming material spacing of the concrete slab and the floor panels of the double floor structure, said double bed The problem is solved by an underfloor zone forming method characterized by laying between a structural concrete slab and a floor panel so that the orientation of the inorganic fibers is parallel to the floor surface.
The inorganic fiber mat in the present invention is obtained by spraying a binder at the time of fiberizing glass wool and rock wool by a known method, forming fibers substantially in a layer, drying while pressing to a desired thickness and density, and curing. Can be At least one inorganic fiber mat obtained in this manner is subjected to processing such as cutting to a predetermined standard and used as a material for forming an underfloor zone of the present invention. It is used as a sheet mat in the underfloor zone forming material of the present invention. When the distribution cable is provided on the floor slab, the zone forming material needs to have elasticity in order to prevent a triangular joint from being generated between the floor slab, the zone forming material, and the wiring cable. This elasticity is greatly affected by the density of the inorganic fiber mat and the orientation of the fibers. In the zone forming material of the present invention, sufficient elasticity in the vertical direction can be obtained by setting the density of the inorganic fiber mat to 5 to 150 kg / m 3 and making the fiber orientation parallel to the floor surface. If the density of the inorganic fiber mat is less than 5 kg / m 3 , the mat is inferior in strength and shape retention and is unsuitable as a zone forming material. If the density is more than 150 kg / m 3 , the mat becomes hard and the flexibility is extremely poor. Triangular joints can form, increasing air leakage and helping the fire run in case of fire. More Density of preferred inorganic fiber mat is 10 to 100 kg / m 3.
[0005]
The metal foil in the present invention is an aluminum foil, a copper foil or the like having a thickness of 1 to 50 μm. Generally, aluminum foil is most suitable because it has good workability and is inexpensive. Those obtained by laminating a glass cloth, a resin film, or a non-woven fabric on these metal foils have strength, are easy to process, and can be used in the metal foils of the present invention.
[0006]
The method of covering the entire surface of the inorganic fiber mat with the metal foil in the present invention includes a method of tightly attaching the mat with a chloroprene-based adhesive to prevent scattering of dust and dust from the inorganic fiber mat.
[0008]
[Action]
Since the underfloor zone forming material of the present invention is formed by laminating one or two or more inorganic fiber mats and completely covering the entire surface with the metal foil 2, dust or dust from inorganic fibers or the like is scattered in the air. Do not scatter. In addition, since the density is 5 to 150 kg / m 3 and the inorganic fibers are laminated so as to be parallel to the floor surface, the elasticity in the vertical direction is extremely excellent, so that when laid between the floor slab and the panel, the underfloor zone is formed. The surface of the material is in tight contact with the lower surface of the panel, and the back surface is in tight contact with the floor slab. Also, even if electric cables and the like are arranged on the floor slab, triangular joints are hardly generated between the floor slab, the underfloor zone forming material, and the wiring cable due to the excellent elasticity of the inorganic fiber mat, so that air leakage is extremely small. .
[0009]
【Example】
[Example 1]
Description will be made based on the drawings. A rock wool mat having a density of 40 kg / m 3 , a thickness of 50 mm, and a binder spray amount of 3% by weight in which the rock wool fibers 2 are oriented parallel to the mat plane is cut into a width of 100 mm and a length of 1000 mm, as shown in FIG. The two sheets were bonded together such that the rock wool fibers 2 were oriented parallel to the mat plane. The whole surface of the bonded rock wool mat 1 is covered so as to be wrapped with an aluminum glass cloth (Almat HS50 manufactured by Sanyo Barrier) 3 and has a density of 40 kg / m 3 , a thickness of 100 mm, a width of 100 mm and a length of 1000 mm. A zone forming material was obtained.
[0010]
[Comparative Example 1]
A rock wool mat having a density of 160 kg / m 3 , a thickness of 25 mm, and a binder spray amount of 3% by weight is cut into a width of 100 mm and a length of 1000 mm, and four pieces are stuck so that the rock wool fibers are oriented parallel to the mat plane. I matched. The entire surface of the bonded rock wool mat was covered so as to be wrapped with a glass cloth to obtain a comparative underfloor zone forming material having a density of 160 kg / m 3 , a thickness of 100 mm, a width of 100 mm, and a length of 1000 mm.
[0011]
[Comparative Example 2]
A rock wool mat having a density of 40 kg / m 3 , a thickness of 50 mm, and a binder spray amount of 3% by weight is cut into a width of 100 mm and a length of 1000 mm, and two pieces are stuck so that the rock wool fibers are oriented parallel to the mat plane. I matched. The entire surface of the bonded rock wool mat was covered so as to be wrapped with a glass cloth to obtain a comparative underfloor zone forming material having a density of 40 kg / m 3 , a thickness of 100 mm, a width of 100 mm, and a length of 1000 mm.
[0012]
[test]
The following tests were performed on the underfloor zone forming materials obtained in Example 1 and Comparative Examples 1 and 2, and the results are shown in Table 1.
Dustproofness: Place the underfloor zone forming materials obtained in Example 1, Comparative Examples 1 and 2 on black paper of about 1.5 m × 1.5 m each and tap lightly 10 times with hand, and then underfloor zone Remove the forming material and observe the number of dusts (including dust) on the black paper.
Elasticity (flexibility): A pipe 5 having a diameter of 30 mm is placed on a horizontal concrete slab 4 as shown in FIG. 2, and a zone forming material 6 for underfloor is placed on the pipe 5 so as to be orthogonal to the pipe 5. Of the concrete floor panel 7 and observe the gap (gap A) between the concrete floor panel 7 and the underfloor zone forming material 6 and the triangular joint (gap B) between the pipe, the underfloor zone forming material and the concrete slab. .
Fire resistance: Base material test according to JIS A 1321.
[0013]
[Table 1]
Figure 0003598582
[0014]
【The invention's effect】
Table 1 underfloor zone forming method results as the present invention showing the dust resistance, elasticity, is excellent in fire resistance, floor blowout air conditioning partitioned by under floor zone forming method of the present invention the double floor structure is for underfloor There is almost no dust generated by the zone forming material, and since it is rich in elasticity, the air leaking from the partition is extremely small and air can be distributed to places requiring air conditioning without waste, and the underfloor zone forming material itself has high heat insulation properties. Extremely high energy saving effect. In addition, it is also excellent in fire protection, so that it is sufficiently effective in preventing the spread of fire under the floor.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an underfloor zone forming material. FIG. 2 is an explanatory diagram of an elasticity test of an underfloor zone forming material.
DESCRIPTION OF SYMBOLS 1 Rock wool mat 2 Rock wool fiber 3 Aluminum glass cloth 4 Concrete slab 5 Pipe 6 Zone forming material for underfloor 7 Concrete floor panel 8 Triangular joint

Claims (1)

二重床構造のコンクリートスラブと床パネルとの間をエアチャンバーとして利用する床吹き出し方式空調設備において、密度5〜150kg/m に形成された無機質繊維マットを1枚または2枚以上積層したマットの全面を金属箔で被覆し、かつ二重床構造のコンクリートスラブと床パネルの間隔の1.2〜1.5倍の厚さの床下用ゾーン形成材を、該二重床構造のコンクリートスラブと床パネルとの間に、無機質繊維の配向が床面に平行になるように敷設することを特徴とする床下ゾーン形成工法。 In a floor blowing type air conditioner using a double floor structure between a concrete slab and a floor panel as an air chamber, a mat in which one or two or more inorganic fiber mats having a density of 5 to 150 kg / m 3 are laminated. the entire surface is coated with metal foil, and a 1.2 to 1.5 times the thickness under floor zone forming material of a double spacing of the concrete slab and the floor panels of the floor structure, the concrete slab of the double floor structure And a floor panel, wherein the inorganic fibers are laid so that the orientation of the inorganic fibers is parallel to the floor surface.
JP1995127390A 1995-04-28 Underfloor zone formation method Expired - Lifetime JP3598582B6 (en)

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JPH08302980A JPH08302980A (en) 1996-11-19
JP3598582B2 true JP3598582B2 (en) 2004-12-08
JP3598582B6 JP3598582B6 (en) 2005-02-16

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